package com.hujing.springsource.a03;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.PropertyValues;
import org.springframework.beans.factory.config.DestructionAwareBeanPostProcessor;
import org.springframework.beans.factory.config.InstantiationAwareBeanPostProcessor;
import org.springframework.stereotype.Component;

@Component
public class MyBeanPostProcessor implements InstantiationAwareBeanPostProcessor, DestructionAwareBeanPostProcessor {
    private static final Logger log = LoggerFactory.getLogger(MyBeanPostProcessor.class);

    @Override
    public void postProcessBeforeDestruction(Object bean, String beanName) throws BeansException {
        if (beanName.equals("lifeCycleBean")) {
            log.info("销毁之前");
        }
    }

    @Override
    public boolean requiresDestruction(Object bean) {
        return DestructionAwareBeanPostProcessor.super.requiresDestruction(bean);
    }

    @Override
    public Object postProcessBeforeInstantiation(Class<?> beanClass, String beanName) throws BeansException {
        if (beanName.equals("lifeCycleBean")) {
            log.info("实例化之前");
        }
        return null;
    }

    @Override
    public boolean postProcessAfterInstantiation(Object bean, String beanName) throws BeansException {
        if (beanName.equals("lifeCycleBean")) {
            log.info("实例化之后,这里如果返回false，会跳过依赖注入阶段");
//            return false;
        }
        return true;
    }

    @Override
    public PropertyValues postProcessProperties(PropertyValues pvs, Object bean, String beanName) throws BeansException {
        if (beanName.equals("lifeCycleBean")) {
            log.info("依赖注入阶段执行，如@Autowired,@Value,@Resource等");
        }
        return pvs;
    }

    @Override
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        if (beanName.equals("lifeCycleBean")) {
            log.info("初始化之前,这里返回的bean会替换掉原来的bean，如@PostConstruct,@ConfigurationProperties等");
        }
        return bean;
    }

    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {

        if (beanName.equals("lifeCycleBean")) {
            log.info("初始化之后,这里返回的bean会替换原来的bean，如代理增强");
        }
        return bean;
    }
}
